Submission #1330986

#	Time	Username	Problem	Language	Result	Execution time	Memory
1330986		boclobanchat	Sails (IOI07_sails)	C++20	45 / 100	12 ms	1896 KiB

sails

#include<bits/stdc++.h>
using namespace std;
const int MAXN=1e5+5;
long long pref[MAXN];
pair<int,int> A[MAXN];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    long long s=0;
    for(int i=1;i<=n;i++)
	{
		cin>>A[i].first>>A[i].second;
		pref[A[i].first]--,pref[0]++,s+=A[i].second;
	}
    for(int i=1;i<1e5;i++) pref[i]+=pref[i-1];
    int l=0,r=n,pos=0;
    while(l<=r)
    {
    	int mid=(l+r)/2;
    	long long sum=0,mx=0;
    	for(int i=1e5;i+1;i--) mx=min(1LL*mid,pref[i]),sum+=mx;
    	if(sum>=s) r=mid-1,pos=mid;
    	else l=mid+1;
	}
	long long ans=0,mx=0,sum=0;
	for(int i=1e5;i+1;i--) mx=min(1LL*pos,pref[i]),ans+=mx*(mx-1)/2,sum+=mx;
	cout<<ans-(sum-s)*(mx-1);
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 5
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10